hw/m48t59.c

   1 /*
   2  * QEMU M48T59 and M48T08 NVRAM emulation for PPC PREP and Sparc platforms
   3  *
   4  * Copyright (c) 2003-2005, 2007 Jocelyn Mayer
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "hw.h"
  25 #include "nvram.h"
  26 #include "qemu-timer.h"
  27 #include "sysemu.h"
  28 #include "sysbus.h"
  29 #include "isa.h"
  30
  31 //#define DEBUG_NVRAM
  32
  33 #if defined(DEBUG_NVRAM)
  34 #define NVRAM_PRINTF(fmt, ...) do { printf(fmt , ## __VA_ARGS__); } while (0)
  35 #else
  36 #define NVRAM_PRINTF(fmt, ...) do { } while (0)
  37 #endif
  38
  39 /*
  40  * The M48T02, M48T08 and M48T59 chips are very similar. The newer '59 has
  41  * alarm and a watchdog timer and related control registers. In the
  42  * PPC platform there is also a nvram lock function.
  43  */
  44
  45 /*
  46  * Chipset docs:
  47  * http://www.st.com/stonline/products/literature/ds/2410/m48t02.pdf
  48  * http://www.st.com/stonline/products/literature/ds/2411/m48t08.pdf
  49  * http://www.st.com/stonline/products/literature/od/7001/m48t59y.pdf
  50  */
  51
  52 struct M48t59State {
  53     /* Hardware parameters */
  54     qemu_irq IRQ;
  55     MemoryRegion iomem;
  56     uint32_t io_base;
  57     uint32_t size;
  58     /* RTC management */
  59     time_t   time_offset;
  60     time_t   stop_time;
  61     /* Alarm & watchdog */
  62     struct tm alarm;
  63     struct QEMUTimer *alrm_timer;
  64     struct QEMUTimer *wd_timer;
  65     /* NVRAM storage */
  66     uint8_t *buffer;
  67     /* Model parameters */
  68     uint32_t type; /* 2 = m48t02, 8 = m48t08, 59 = m48t59 */
  69     /* NVRAM storage */
  70     uint16_t addr;
  71     uint8_t  lock;
  72 };
  73
  74 typedef struct M48t59ISAState {
  75     ISADevice busdev;
  76     M48t59State state;
  77     MemoryRegion io;
  78 } M48t59ISAState;
  79
  80 typedef struct M48t59SysBusState {
  81     SysBusDevice busdev;
  82     M48t59State state;
  83 } M48t59SysBusState;
  84
  85 /* Fake timer functions */
  86
  87 /* Alarm management */
  88 static void alarm_cb (void *opaque)
  89 {
  90     struct tm tm;
  91     uint64_t next_time;
  92     M48t59State *NVRAM = opaque;
  93
  94     qemu_set_irq(NVRAM->IRQ, 1);
  95     if ((NVRAM->buffer[0x1FF5] & 0x80) == 0 &&
  96         (NVRAM->buffer[0x1FF4] & 0x80) == 0 &&
  97         (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
  98         (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
  99         /* Repeat once a month */
 100         qemu_get_timedate(&tm, NVRAM->time_offset);
 101         tm.tm_mon++;
 102         if (tm.tm_mon == 13) {
 103             tm.tm_mon = 1;
 104             tm.tm_year++;
 105         }
 106         next_time = qemu_timedate_diff(&tm) - NVRAM->time_offset;
 107     } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
 108                (NVRAM->buffer[0x1FF4] & 0x80) == 0 &&
 109                (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
 110                (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
 111         /* Repeat once a day */
 112         next_time = 24 * 60 * 60;
 113     } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
 114                (NVRAM->buffer[0x1FF4] & 0x80) != 0 &&
 115                (NVRAM->buffer[0x1FF3] & 0x80) == 0 &&
 116                (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
 117         /* Repeat once an hour */
 118         next_time = 60 * 60;
 119     } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 &&
 120                (NVRAM->buffer[0x1FF4] & 0x80) != 0 &&
 121                (NVRAM->buffer[0x1FF3] & 0x80) != 0 &&
 122                (NVRAM->buffer[0x1FF2] & 0x80) == 0) {
 123         /* Repeat once a minute */
 124         next_time = 60;
 125     } else {
 126         /* Repeat once a second */
 127         next_time = 1;
 128     }
 129     qemu_mod_timer(NVRAM->alrm_timer, qemu_get_clock_ns(rtc_clock) +
 130                     next_time * 1000);
 131     qemu_set_irq(NVRAM->IRQ, 0);
 132 }
 133
 134 static void set_alarm(M48t59State *NVRAM)
 135 {
 136     int diff;
 137     if (NVRAM->alrm_timer != NULL) {
 138         qemu_del_timer(NVRAM->alrm_timer);
 139         diff = qemu_timedate_diff(&NVRAM->alarm) - NVRAM->time_offset;
 140         if (diff > 0)
 141             qemu_mod_timer(NVRAM->alrm_timer, diff * 1000);
 142     }
 143 }
 144
 145 /* RTC management helpers */
 146 static inline void get_time(M48t59State *NVRAM, struct tm *tm)
 147 {
 148     qemu_get_timedate(tm, NVRAM->time_offset);
 149 }
 150
 151 static void set_time(M48t59State *NVRAM, struct tm *tm)
 152 {
 153     NVRAM->time_offset = qemu_timedate_diff(tm);
 154     set_alarm(NVRAM);
 155 }
 156
 157 /* Watchdog management */
 158 static void watchdog_cb (void *opaque)
 159 {
 160     M48t59State *NVRAM = opaque;
 161
 162     NVRAM->buffer[0x1FF0] |= 0x80;
 163     if (NVRAM->buffer[0x1FF7] & 0x80) {
 164         NVRAM->buffer[0x1FF7] = 0x00;
 165         NVRAM->buffer[0x1FFC] &= ~0x40;
 166         /* May it be a hw CPU Reset instead ? */
 167         qemu_system_reset_request();
 168     } else {
 169         qemu_set_irq(NVRAM->IRQ, 1);
 170         qemu_set_irq(NVRAM->IRQ, 0);
 171     }
 172 }
 173
 174 static void set_up_watchdog(M48t59State *NVRAM, uint8_t value)
 175 {
 176     uint64_t interval; /* in 1/16 seconds */
 177
 178     NVRAM->buffer[0x1FF0] &= ~0x80;
 179     if (NVRAM->wd_timer != NULL) {
 180         qemu_del_timer(NVRAM->wd_timer);
 181         if (value != 0) {
 182             interval = (1 << (2 * (value & 0x03))) * ((value >> 2) & 0x1F);
 183             qemu_mod_timer(NVRAM->wd_timer, ((uint64_t)time(NULL) * 1000) +
 184                            ((interval * 1000) >> 4));
 185         }
 186     }
 187 }
 188
 189 /* Direct access to NVRAM */
 190 void m48t59_write (void *opaque, uint32_t addr, uint32_t val)
 191 {
 192     M48t59State *NVRAM = opaque;
 193     struct tm tm;
 194     int tmp;
 195
 196     if (addr > 0x1FF8 && addr < 0x2000)
 197         NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);
 198
 199     /* check for NVRAM access */
 200     if ((NVRAM->type == 2 && addr < 0x7f8) ||
 201         (NVRAM->type == 8 && addr < 0x1ff8) ||
 202         (NVRAM->type == 59 && addr < 0x1ff0))
 203         goto do_write;
 204
 205     /* TOD access */
 206     switch (addr) {
 207     case 0x1FF0:
 208         /* flags register : read-only */
 209         break;
 210     case 0x1FF1:
 211         /* unused */
 212         break;
 213     case 0x1FF2:
 214         /* alarm seconds */
 215         tmp = from_bcd(val & 0x7F);
 216         if (tmp >= 0 && tmp <= 59) {
 217             NVRAM->alarm.tm_sec = tmp;
 218             NVRAM->buffer[0x1FF2] = val;
 219             set_alarm(NVRAM);
 220         }
 221         break;
 222     case 0x1FF3:
 223         /* alarm minutes */
 224         tmp = from_bcd(val & 0x7F);
 225         if (tmp >= 0 && tmp <= 59) {
 226             NVRAM->alarm.tm_min = tmp;
 227             NVRAM->buffer[0x1FF3] = val;
 228             set_alarm(NVRAM);
 229         }
 230         break;
 231     case 0x1FF4:
 232         /* alarm hours */
 233         tmp = from_bcd(val & 0x3F);
 234         if (tmp >= 0 && tmp <= 23) {
 235             NVRAM->alarm.tm_hour = tmp;
 236             NVRAM->buffer[0x1FF4] = val;
 237             set_alarm(NVRAM);
 238         }
 239         break;
 240     case 0x1FF5:
 241         /* alarm date */
 242         tmp = from_bcd(val & 0x3F);
 243         if (tmp != 0) {
 244             NVRAM->alarm.tm_mday = tmp;
 245             NVRAM->buffer[0x1FF5] = val;
 246             set_alarm(NVRAM);
 247         }
 248         break;
 249     case 0x1FF6:
 250         /* interrupts */
 251         NVRAM->buffer[0x1FF6] = val;
 252         break;
 253     case 0x1FF7:
 254         /* watchdog */
 255         NVRAM->buffer[0x1FF7] = val;
 256         set_up_watchdog(NVRAM, val);
 257         break;
 258     case 0x1FF8:
 259     case 0x07F8:
 260         /* control */
 261        NVRAM->buffer[addr] = (val & ~0xA0) | 0x90;
 262         break;
 263     case 0x1FF9:
 264     case 0x07F9:
 265         /* seconds (BCD) */
 266         tmp = from_bcd(val & 0x7F);
 267         if (tmp >= 0 && tmp <= 59) {
 268             get_time(NVRAM, &tm);
 269             tm.tm_sec = tmp;
 270             set_time(NVRAM, &tm);
 271         }
 272         if ((val & 0x80) ^ (NVRAM->buffer[addr] & 0x80)) {
 273             if (val & 0x80) {
 274                 NVRAM->stop_time = time(NULL);
 275             } else {
 276                 NVRAM->time_offset += NVRAM->stop_time - time(NULL);
 277                 NVRAM->stop_time = 0;
 278             }
 279         }
 280         NVRAM->buffer[addr] = val & 0x80;
 281         break;
 282     case 0x1FFA:
 283     case 0x07FA:
 284         /* minutes (BCD) */
 285         tmp = from_bcd(val & 0x7F);
 286         if (tmp >= 0 && tmp <= 59) {
 287             get_time(NVRAM, &tm);
 288             tm.tm_min = tmp;
 289             set_time(NVRAM, &tm);
 290         }
 291         break;
 292     case 0x1FFB:
 293     case 0x07FB:
 294         /* hours (BCD) */
 295         tmp = from_bcd(val & 0x3F);
 296         if (tmp >= 0 && tmp <= 23) {
 297             get_time(NVRAM, &tm);
 298             tm.tm_hour = tmp;
 299             set_time(NVRAM, &tm);
 300         }
 301         break;
 302     case 0x1FFC:
 303     case 0x07FC:
 304         /* day of the week / century */
 305         tmp = from_bcd(val & 0x07);
 306         get_time(NVRAM, &tm);
 307         tm.tm_wday = tmp;
 308         set_time(NVRAM, &tm);
 309         NVRAM->buffer[addr] = val & 0x40;
 310         break;
 311     case 0x1FFD:
 312     case 0x07FD:
 313         /* date (BCD) */
 314        tmp = from_bcd(val & 0x3F);
 315         if (tmp != 0) {
 316             get_time(NVRAM, &tm);
 317             tm.tm_mday = tmp;
 318             set_time(NVRAM, &tm);
 319         }
 320         break;
 321     case 0x1FFE:
 322     case 0x07FE:
 323         /* month */
 324         tmp = from_bcd(val & 0x1F);
 325         if (tmp >= 1 && tmp <= 12) {
 326             get_time(NVRAM, &tm);
 327             tm.tm_mon = tmp - 1;
 328             set_time(NVRAM, &tm);
 329         }
 330         break;
 331     case 0x1FFF:
 332     case 0x07FF:
 333         /* year */
 334         tmp = from_bcd(val);
 335         if (tmp >= 0 && tmp <= 99) {
 336             get_time(NVRAM, &tm);
 337             if (NVRAM->type == 8)
 338                 tm.tm_year = from_bcd(val) + 68; // Base year is 1968
 339             else
 340                 tm.tm_year = from_bcd(val);
 341             set_time(NVRAM, &tm);
 342         }
 343         break;
 344     default:
 345         /* Check lock registers state */
 346         if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1))
 347             break;
 348         if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2))
 349             break;
 350     do_write:
 351         if (addr < NVRAM->size) {
 352             NVRAM->buffer[addr] = val & 0xFF;
 353         }
 354         break;
 355     }
 356 }
 357
 358 uint32_t m48t59_read (void *opaque, uint32_t addr)
 359 {
 360     M48t59State *NVRAM = opaque;
 361     struct tm tm;
 362     uint32_t retval = 0xFF;
 363
 364     /* check for NVRAM access */
 365     if ((NVRAM->type == 2 && addr < 0x078f) ||
 366         (NVRAM->type == 8 && addr < 0x1ff8) ||
 367         (NVRAM->type == 59 && addr < 0x1ff0))
 368         goto do_read;
 369
 370     /* TOD access */
 371     switch (addr) {
 372     case 0x1FF0:
 373         /* flags register */
 374         goto do_read;
 375     case 0x1FF1:
 376         /* unused */
 377         retval = 0;
 378         break;
 379     case 0x1FF2:
 380         /* alarm seconds */
 381         goto do_read;
 382     case 0x1FF3:
 383         /* alarm minutes */
 384         goto do_read;
 385     case 0x1FF4:
 386         /* alarm hours */
 387         goto do_read;
 388     case 0x1FF5:
 389         /* alarm date */
 390         goto do_read;
 391     case 0x1FF6:
 392         /* interrupts */
 393         goto do_read;
 394     case 0x1FF7:
 395         /* A read resets the watchdog */
 396         set_up_watchdog(NVRAM, NVRAM->buffer[0x1FF7]);
 397         goto do_read;
 398     case 0x1FF8:
 399     case 0x07F8:
 400         /* control */
 401         goto do_read;
 402     case 0x1FF9:
 403     case 0x07F9:
 404         /* seconds (BCD) */
 405         get_time(NVRAM, &tm);
 406         retval = (NVRAM->buffer[addr] & 0x80) | to_bcd(tm.tm_sec);
 407         break;
 408     case 0x1FFA:
 409     case 0x07FA:
 410         /* minutes (BCD) */
 411         get_time(NVRAM, &tm);
 412         retval = to_bcd(tm.tm_min);
 413         break;
 414     case 0x1FFB:
 415     case 0x07FB:
 416         /* hours (BCD) */
 417         get_time(NVRAM, &tm);
 418         retval = to_bcd(tm.tm_hour);
 419         break;
 420     case 0x1FFC:
 421     case 0x07FC:
 422         /* day of the week / century */
 423         get_time(NVRAM, &tm);
 424         retval = NVRAM->buffer[addr] | tm.tm_wday;
 425         break;
 426     case 0x1FFD:
 427     case 0x07FD:
 428         /* date */
 429         get_time(NVRAM, &tm);
 430         retval = to_bcd(tm.tm_mday);
 431         break;
 432     case 0x1FFE:
 433     case 0x07FE:
 434         /* month */
 435         get_time(NVRAM, &tm);
 436         retval = to_bcd(tm.tm_mon + 1);
 437         break;
 438     case 0x1FFF:
 439     case 0x07FF:
 440         /* year */
 441         get_time(NVRAM, &tm);
 442         if (NVRAM->type == 8)
 443             retval = to_bcd(tm.tm_year - 68); // Base year is 1968
 444         else
 445             retval = to_bcd(tm.tm_year);
 446         break;
 447     default:
 448         /* Check lock registers state */
 449         if (addr >= 0x20 && addr <= 0x2F && (NVRAM->lock & 1))
 450             break;
 451         if (addr >= 0x30 && addr <= 0x3F && (NVRAM->lock & 2))
 452             break;
 453     do_read:
 454         if (addr < NVRAM->size) {
 455             retval = NVRAM->buffer[addr];
 456         }
 457         break;
 458     }
 459     if (addr > 0x1FF9 && addr < 0x2000)
 460        NVRAM_PRINTF("%s: 0x%08x <= 0x%08x\n", __func__, addr, retval);
 461
 462     return retval;
 463 }
 464
 465 void m48t59_set_addr (void *opaque, uint32_t addr)
 466 {
 467     M48t59State *NVRAM = opaque;
 468
 469     NVRAM->addr = addr;
 470 }
 471
 472 void m48t59_toggle_lock (void *opaque, int lock)
 473 {
 474     M48t59State *NVRAM = opaque;
 475
 476     NVRAM->lock ^= 1 << lock;
 477 }
 478
 479 /* IO access to NVRAM */
 480 static void NVRAM_writeb (void *opaque, uint32_t addr, uint32_t val)
 481 {
 482     M48t59State *NVRAM = opaque;
 483
 484     NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, addr, val);
 485     switch (addr) {
 486     case 0:
 487         NVRAM->addr &= ~0x00FF;
 488         NVRAM->addr |= val;
 489         break;
 490     case 1:
 491         NVRAM->addr &= ~0xFF00;
 492         NVRAM->addr |= val << 8;
 493         break;
 494     case 3:
 495         m48t59_write(NVRAM, NVRAM->addr, val);
 496         NVRAM->addr = 0x0000;
 497         break;
 498     default:
 499         break;
 500     }
 501 }
 502
 503 static uint32_t NVRAM_readb (void *opaque, uint32_t addr)
 504 {
 505     M48t59State *NVRAM = opaque;
 506     uint32_t retval;
 507
 508     switch (addr) {
 509     case 3:
 510         retval = m48t59_read(NVRAM, NVRAM->addr);
 511         break;
 512     default:
 513         retval = -1;
 514         break;
 515     }
 516     NVRAM_PRINTF("%s: 0x%08x <= 0x%08x\n", __func__, addr, retval);
 517
 518     return retval;
 519 }
 520
 521 static void nvram_writeb (void *opaque, target_phys_addr_t addr, uint32_t value)
 522 {
 523     M48t59State *NVRAM = opaque;
 524
 525     m48t59_write(NVRAM, addr, value & 0xff);
 526 }
 527
 528 static void nvram_writew (void *opaque, target_phys_addr_t addr, uint32_t value)
 529 {
 530     M48t59State *NVRAM = opaque;
 531
 532     m48t59_write(NVRAM, addr, (value >> 8) & 0xff);
 533     m48t59_write(NVRAM, addr + 1, value & 0xff);
 534 }
 535
 536 static void nvram_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
 537 {
 538     M48t59State *NVRAM = opaque;
 539
 540     m48t59_write(NVRAM, addr, (value >> 24) & 0xff);
 541     m48t59_write(NVRAM, addr + 1, (value >> 16) & 0xff);
 542     m48t59_write(NVRAM, addr + 2, (value >> 8) & 0xff);
 543     m48t59_write(NVRAM, addr + 3, value & 0xff);
 544 }
 545
 546 static uint32_t nvram_readb (void *opaque, target_phys_addr_t addr)
 547 {
 548     M48t59State *NVRAM = opaque;
 549     uint32_t retval;
 550
 551     retval = m48t59_read(NVRAM, addr);
 552     return retval;
 553 }
 554
 555 static uint32_t nvram_readw (void *opaque, target_phys_addr_t addr)
 556 {
 557     M48t59State *NVRAM = opaque;
 558     uint32_t retval;
 559
 560     retval = m48t59_read(NVRAM, addr) << 8;
 561     retval |= m48t59_read(NVRAM, addr + 1);
 562     return retval;
 563 }
 564
 565 static uint32_t nvram_readl (void *opaque, target_phys_addr_t addr)
 566 {
 567     M48t59State *NVRAM = opaque;
 568     uint32_t retval;
 569
 570     retval = m48t59_read(NVRAM, addr) << 24;
 571     retval |= m48t59_read(NVRAM, addr + 1) << 16;
 572     retval |= m48t59_read(NVRAM, addr + 2) << 8;
 573     retval |= m48t59_read(NVRAM, addr + 3);
 574     return retval;
 575 }
 576
 577 static const MemoryRegionOps nvram_ops = {
 578     .old_mmio = {
 579         .read = { nvram_readb, nvram_readw, nvram_readl, },
 580         .write = { nvram_writeb, nvram_writew, nvram_writel, },
 581     },
 582     .endianness = DEVICE_NATIVE_ENDIAN,
 583 };
 584
 585 static const VMStateDescription vmstate_m48t59 = {
 586     .name = "m48t59",
 587     .version_id = 1,
 588     .minimum_version_id = 1,
 589     .minimum_version_id_old = 1,
 590     .fields      = (VMStateField[]) {
 591         VMSTATE_UINT8(lock, M48t59State),
 592         VMSTATE_UINT16(addr, M48t59State),
 593         VMSTATE_VBUFFER_UINT32(buffer, M48t59State, 0, NULL, 0, size),
 594         VMSTATE_END_OF_LIST()
 595     }
 596 };
 597
 598 static void m48t59_reset_common(M48t59State *NVRAM)
 599 {
 600     NVRAM->addr = 0;
 601     NVRAM->lock = 0;
 602     if (NVRAM->alrm_timer != NULL)
 603         qemu_del_timer(NVRAM->alrm_timer);
 604
 605     if (NVRAM->wd_timer != NULL)
 606         qemu_del_timer(NVRAM->wd_timer);
 607 }
 608
 609 static void m48t59_reset_isa(DeviceState *d)
 610 {
 611     M48t59ISAState *isa = container_of(d, M48t59ISAState, busdev.qdev);
 612     M48t59State *NVRAM = &isa->state;
 613
 614     m48t59_reset_common(NVRAM);
 615 }
 616
 617 static void m48t59_reset_sysbus(DeviceState *d)
 618 {
 619     M48t59SysBusState *sys = container_of(d, M48t59SysBusState, busdev.qdev);
 620     M48t59State *NVRAM = &sys->state;
 621
 622     m48t59_reset_common(NVRAM);
 623 }
 624
 625 static const MemoryRegionPortio m48t59_portio[] = {
 626     {0, 4, 1, .read = NVRAM_readb, .write = NVRAM_writeb },
 627     PORTIO_END_OF_LIST(),
 628 };
 629
 630 static const MemoryRegionOps m48t59_io_ops = {
 631     .old_portio = m48t59_portio,
 632 };
 633
 634 /* Initialisation routine */
 635 M48t59State *m48t59_init(qemu_irq IRQ, target_phys_addr_t mem_base,
 636                          uint32_t io_base, uint16_t size, int type)
 637 {
 638     DeviceState *dev;
 639     SysBusDevice *s;
 640     M48t59SysBusState *d;
 641     M48t59State *state;
 642
 643     dev = qdev_create(NULL, "m48t59");
 644     qdev_prop_set_uint32(dev, "type", type);
 645     qdev_prop_set_uint32(dev, "size", size);
 646     qdev_prop_set_uint32(dev, "io_base", io_base);
 647     qdev_init_nofail(dev);
 648     s = sysbus_from_qdev(dev);
 649     d = FROM_SYSBUS(M48t59SysBusState, s);
 650     state = &d->state;
 651     sysbus_connect_irq(s, 0, IRQ);
 652     if (io_base != 0) {
 653         register_ioport_read(io_base, 0x04, 1, NVRAM_readb, state);
 654         register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, state);
 655     }
 656     if (mem_base != 0) {
 657         sysbus_mmio_map(s, 0, mem_base);
 658     }
 659
 660     return state;
 661 }
 662
 663 M48t59State *m48t59_init_isa(ISABus *bus, uint32_t io_base, uint16_t size,
 664                              int type)
 665 {
 666     M48t59ISAState *d;
 667     ISADevice *dev;
 668     M48t59State *s;
 669
 670     dev = isa_create(bus, "m48t59_isa");
 671     qdev_prop_set_uint32(&dev->qdev, "type", type);
 672     qdev_prop_set_uint32(&dev->qdev, "size", size);
 673     qdev_prop_set_uint32(&dev->qdev, "io_base", io_base);
 674     qdev_init_nofail(&dev->qdev);
 675     d = DO_UPCAST(M48t59ISAState, busdev, dev);
 676     s = &d->state;
 677
 678     memory_region_init_io(&d->io, &m48t59_io_ops, s, "m48t59", 4);
 679     if (io_base != 0) {
 680         isa_register_ioport(dev, &d->io, io_base);
 681     }
 682
 683     return s;
 684 }
 685
 686 static void m48t59_init_common(M48t59State *s)
 687 {
 688     s->buffer = g_malloc0(s->size);
 689     if (s->type == 59) {
 690         s->alrm_timer = qemu_new_timer_ns(rtc_clock, &alarm_cb, s);
 691         s->wd_timer = qemu_new_timer_ns(vm_clock, &watchdog_cb, s);
 692     }
 693     qemu_get_timedate(&s->alarm, 0);
 694
 695     vmstate_register(NULL, -1, &vmstate_m48t59, s);
 696 }
 697
 698 static int m48t59_init_isa1(ISADevice *dev)
 699 {
 700     M48t59ISAState *d = DO_UPCAST(M48t59ISAState, busdev, dev);
 701     M48t59State *s = &d->state;
 702
 703     isa_init_irq(dev, &s->IRQ, 8);
 704     m48t59_init_common(s);
 705
 706     return 0;
 707 }
 708
 709 static int m48t59_init1(SysBusDevice *dev)
 710 {
 711     M48t59SysBusState *d = FROM_SYSBUS(M48t59SysBusState, dev);
 712     M48t59State *s = &d->state;
 713
 714     sysbus_init_irq(dev, &s->IRQ);
 715
 716     memory_region_init_io(&s->iomem, &nvram_ops, s, "m48t59.nvram", s->size);
 717     sysbus_init_mmio(dev, &s->iomem);
 718     m48t59_init_common(s);
 719
 720     return 0;
 721 }
 722
 723 static Property m48t59_isa_properties[] = {
 724     DEFINE_PROP_UINT32("size",    M48t59ISAState, state.size,    -1),
 725     DEFINE_PROP_UINT32("type",    M48t59ISAState, state.type,    -1),
 726     DEFINE_PROP_HEX32( "io_base", M48t59ISAState, state.io_base,  0),
 727     DEFINE_PROP_END_OF_LIST(),
 728 };
 729
 730 static void m48t59_init_class_isa1(ObjectClass *klass, void *data)
 731 {
 732     DeviceClass *dc = DEVICE_CLASS(klass);
 733     ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
 734     ic->init = m48t59_init_isa1;
 735     dc->no_user = 1;
 736     dc->reset = m48t59_reset_isa;
 737     dc->props = m48t59_isa_properties;
 738 }
 739
 740 static TypeInfo m48t59_isa_info = {
 741     .name          = "m48t59_isa",
 742     .parent        = TYPE_ISA_DEVICE,
 743     .instance_size = sizeof(M48t59ISAState),
 744     .class_init    = m48t59_init_class_isa1,
 745 };
 746
 747 static Property m48t59_properties[] = {
 748     DEFINE_PROP_UINT32("size",    M48t59SysBusState, state.size,    -1),
 749     DEFINE_PROP_UINT32("type",    M48t59SysBusState, state.type,    -1),
 750     DEFINE_PROP_HEX32( "io_base", M48t59SysBusState, state.io_base,  0),
 751     DEFINE_PROP_END_OF_LIST(),
 752 };
 753
 754 static void m48t59_class_init(ObjectClass *klass, void *data)
 755 {
 756     DeviceClass *dc = DEVICE_CLASS(klass);
 757     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 758
 759     k->init = m48t59_init1;
 760     dc->reset = m48t59_reset_sysbus;
 761     dc->props = m48t59_properties;
 762 }
 763
 764 static TypeInfo m48t59_info = {
 765     .name          = "m48t59",
 766     .parent        = TYPE_SYS_BUS_DEVICE,
 767     .instance_size = sizeof(M48t59SysBusState),
 768     .class_init    = m48t59_class_init,
 769 };
 770
 771 static void m48t59_register_types(void)
 772 {
 773     type_register_static(&m48t59_info);
 774     type_register_static(&m48t59_isa_info);
 775 }
 776
 777 type_init(m48t59_register_types)